Question

solve for b:
xy-ab=cd

Answer 1

-xy each side?

Answer 2

We want to get b on one side and all the rest of the stuff on the other.
First step: subtract xy from both sides. What do we get?

Answer 3

Right:
-ab = cd -xy

Answer 4

-ab=cd-xy

Answer 5

divide -ab

Answer 6

Not ab: just a.

Answer 7

Because remember, we want to solve for b.

Answer 8

just a. ok

Answer 9

Then what do we get?

Answer 10

b= -cda-xya

Answer 11

hmmm

Answer 12

something looks wrong...

Answer 13

Write it as a fraction.

Answer 14

b=cd-xy
_____
-a

Answer 15

Very good!
That's your answer!

Answer 16

That was quick--I barely even did anything. :)

Answer 17

it says the a is positive

Answer 18

maybe it wants you to do
xy - cd
-------
a
?

Answer 19

It's basically the same. You're just "shifting the negative" from numerator to denominator.

Answer 20

ok great

Answer 21

no problem